ObjectiveTo explore the prognostic value of modified Glasgow Prognostic Score (mGPS) in lung cancer patients.MethodsThe clinical data and follow-up information of patients with lung cancer diagnosed for the first time in West China Hospital of Sichuan University from August 2008 to May 2013 were retrospectively analyzed. Overall survival (OS) of patients with different mGPS were compared by Kaplan-Meier test and log-rank test. Univariate and multivariate Cox proportional hazard analysis were performed, and hazard ratio (HR) and 95% confidence interval (CI) were counted to evaluate the predictive value of different prognostic factors in patients with lung cancer.ResultsA total of 289 patients were included. According to the mGPS score, 127 patients had 0 point, 90 patients had 1 point, and 72 patients had 2 points. The OS of lung cancer patients with mGPS=0 was better than that of patients with mGPS=1 and mGPS=2 (P<0.001). Cox proportional hazards of univariate analysis revealed that age< 65 (P=0.022), stage for Ⅰand Ⅱ (P<0.001), surgery (P<0.001), chemotherapy (P=0.018), and mGPS=0 (1 vs. 0, P=0.008; 2 vs. 0, P<0.001) were the protective factors for lung cancer patients (P<0.05). Multiple-factor analysis showed that age [HR=0.680, 95%CI (0.508, 0.911), P=0.010], stage [HR=0.580, 95%CI (0.359, 0.939), P=0.027], operation [HR=0.254, 95%CI (0.140, 0.459), P<0.001], chemotherapy [HR=0.624, 95%CI (0.435, 0.893), P=0.010], mGPS (1 vs. 0) [HR=1.548, 95%CI (1.101, 2.176), P=0.012] and mGPS (2 vs. 0) [HR=1.425, 95%CI (1.003, 2.024), P=0.048] were independent predictors of OS in patients with lung cancer.ConclusionmGPS could be considered as an independent prognostic factor in lung cancer.